'''
Created on Jun 17, 2011

@author: arthur
'''

from Nodo import *

class NullNode(Nodo):
    '''
    classdocs
    '''


    def __init__(self):
        self.set_pai(None)
        self.set_cor(self.black)
        self.set_esq(None)
        self.set_dir(None)
        